Hey there Alystin!
I’ve read other users have them for that long or longer and not report a problem with efficacy. Check out what Steve says here:
An Introduction to Mones; Names, Size, Strength, Use, Effects & Length of
Molecule L?!? CTTM?!? That’s some old school stuff you got there! Very nice!!! I’d like to see a report on CTTM or Molecule L from ya!!! 
Don’t suggest you mix them all in a bottle as you will not be able to tell what the final outcome of the mone mixture will be. I’ve heard it described as mixing drinks… you ask for a Tequila Sunrise, a Cherry Hooker, and a Fuzzy Navel and pour them all into one glass and what do you get?!? An alcoholic concoction that you won’t know what to do with!!!
I’d suggest you finish them off individually, layered on your skin… like your IS/b and Instant Shine for example. My wife does this often. Then when the mones are dry, cover with Euphoria Blossom… Now, that’s a combo!!!